Pipe coupling



May' 11, 143.

G. E. ARMINGTON Erm. 2,318,575

PIPE COUPLING Filed Dec. 21, 1940 ENTOR GEORGE ARMINGTON RMOND Q. ARMINGTON Patented May il, 1943 PIPE COUPLING George E. Armington, South Euclid, and Raymond Q. Armington. Shaker Heights, Ohio, assignors The Euclid Road Machinery Company,

Euclid, Ohio, a corporation of Ohio Application December 2l, 1940, Serial No. 371,193

4 Claims.

of will be set forth in the claims.

In the drawing, Fig. l is a central longitudinal sectional view through our improved coupling; Fig. 2 is a sectional view taken along the line 2--2 of Fig. l: while Figs. 3 and 4 are plan views of two of the rings shown in Fig. 1.

Referring nrst to Fig. 1, a housing or other structure to which the pipe is to be coupled is indicated at II having formed therein, in suitable bosses or otherwise, a recess I2 having at its inner end 'a irustoconical surface Ila diverging outwardly and a threaded portion I2b at the outer end of the recess. The pipe I3 which is to be connected to the housing in a leaicproof manner is provided with an annular groove at Ila. A lock ring Il, shown' in plan in Fig. 3, has a frustoconical surface Illa complementary to the surface I2a on the housing. The ring is also provided with an annular inwardly extending projection IIb adapted to fit into the groove or recess |341 in the pipe. The diameter of the ring at the point Ilc is adapted to slide on the outside diameter of pipe I3. At I5 are indicated lint annular metal washers between which is an annular washer or gasket I6 of rubber or other compressible material adaptede to t fairly closely between the pipe I3 and the recess I2 in the housing. A wedge ring Il has an internal diameter adapted to slide on pipe I3 and is provided with a frustoconical surface Ila converging outwardly or toward the right as viewed in Fig. 1 and complementary to a similar surface Illa on a packing nut I8` which engages the threads I2b of the housing recess. Y

-In the use of our invention the parts are slipped on the pipe I3 in the order shown in Fig. 1, the lock ring Il being the last member in position and adapted to be snapped in groove I3a .because of the split ring construction shown in packing nut IB engaged with the threads I2b.

The wedge ring II squeezes the gasket I6 against the lock ring Il causing a very tight engagement between the gasket and pipe I3 on one hand and between the gasket and the recess I2 of the housing II on the other hand. The efiiciency of this joint is so great that using ai" pipe as indicated at I3, the packing nut III when tightened by hand will provide a joint adapted to withstand a pressure of 1,( i00 pounds per square inch without leakage.

By the use of our improved pipe coupling connections may be cheaply made b'y the use of few parts of simple design. If a leak occurs at any `joint it is only necessary to tighten up on the packing nut IB to stop leakage and ii a new gasket is necessary a single joint may be disassembled without disconnecting the other joints along the pipe as in the case where the customary unions or pipe couplings are used.

There is sumcient clearance between the metal parts of our improved coupling so that there is no dimculty about the aiinement of the joint.

It will be noted upon an inspection of Fig. 1, that fluid pressure in the system exerts an unbalanced eiect upon the exposed end of pipe I3 at the point I9. Obviously when this pressure is extremely high there is a tendency to move pipe I3 toward the right as viewed in Fig. 1 and because of the tight engagement between the pipe and the lock ring Il this pressure is exerted against the sealing gasket IB so as to increase the sealing eiiect.

What we claim is:

i. In a pipe coupling, inner and outer telescoping tubular. members, a deformation in the outer wall of said inner member where it lies within the outer member, a lock ring lying' between said members and engaging said defamation, said lock ring having internal dimensions permitting it to pass over the end of said einner member lying in the outer member, said lock ring also being adapted to be slipped on the end of said inner member and past said deformation, a packing nut embracing said inner member and having threaded engagement with said outer member for drawing said nut toward said lock ring, andan annular ring of compressible sealing material snugly fitting between said members and compressed between said nut a d said lock ring, said inner tubular member beng free to slide relative to said outer tubular member In memberseparating direction. whereby sald'lock ringgwill compress said sealing material.

2. In a pipe coupling, inner and outer telescoping tubular members, there being a recess in the cuter wall of said inner member where it lies within theouter member, a split lock ring adapted to slide over the end of said inner member lying within the outer member, there being a lip on said lock ring adapted to enter said recess. a packing nui'l embracing said inner member and having threaded engagement with said outer member for drawing said nut toward said lock ring, and an annular ring oi' compressible sealing material snugly ttlng between said members and compressed between said nut and said lock ring, said inner tubular member being free to slide relative to said outer tubular member in member-separating direction, whereby said lock Aring will compress said sealing material.

3. In a pipe coupling, inner and outer telescoping tubular members, there being a recess in the outer wall of said inner member where it lies within the outer member, a split lock ring adapted to slide over the end of said inner member lying within the outer member, there being a lip on said lock ring adapted to enter said recess, a packlng nut embracing said inner member and having threaded engagement with said outer member for drawing said nut toward said lock ring, and an annular ring of compressible sealing material snugly tting between said members and compressed between said nut and said lock ring, said inner tubular member being free to slide relative to said outer tubular member in member-separating direction, whereby said lock ring will compress said sealing material. there being coactina parts between said outer member and said lock ring for urging said lip into said recess as said packing nut is tightened.

4. In a pipe coupling, inner and outer telescoping tubular members, there being a recess in the outer wail of said inner member in the end thereof which lies within the outer member, said outer member having an inside wall diverging radially outward and away from said end of said inner member, the following parts being adapted to slip over said end of said inner member and to be assembled thereon in the order named, a packing nut, a wedge ring. an annular ring of compressible sealing material tting snugly between said inner and outer members, and a lock ring, said packing nut having threaded engagement with said outer member for drawing the nut toward said end of said inner member. there being a part on said lock ring adapted to enter said recess, there being a surface on said lock ring complementary to said diverging wall of said outer member for urging said lock ring toward said inner member when said nut is tightened. and there being coacting surfaces on said wedge ring and packing nut for urging said wedge ring toward said inner member when said nut is tightened.

GEORGE E. ARMINGTON. RAYMOND Q` ARMINGTON. 

